_________________LET:>>cxcxc be a Rubik's Cube>>U be the set of all tangible Rubik's Cubes,>>i.e., U={cxcxc | c is an integer and lies in the interval [2,11]}>>C be the set of my cubes on hand>>S={2, 3, 4, 5}MY CUBES ON HAND CAN BE THE DESCRIBED BY THE SET C where...>>C={nxnxn element of set U | n is an element of S}